Internal combustion motor



Dec. 15, 1931. A, McFARLAND AL 1,836,081

INTERNAL COMBUSTION minor:

Filed Feb. 21, 1929- 3 Sheets-Sheet I amnion m 9. 7h vmm-- A. F. MCFARLAND ET AL 1,836,081

INTERNAL COMBUSTI ON MOTOR Filed Feb. 21, 1929 S SheetS-Sheet 2 M in! 1931- A. F. M FARLAND ET AL INTERNAL COMBUSTION MOTOR 3 Sheets-Sheet 3 Filed Feb. 21, 1929 nlnlllll Q Patented Dec. 15, 1931 UNITED STATES PATENT: "OFFICE? ARTIE F. MCFARLAND AND ARTHUR E. MCFARLAND, OF HOUSTON, TEXAS" 3 INTERNAL COMBUSTION .MOTQR Application filed February 21, 1929. Serial No. 341,774.

This invention relates to new and useful improvements in an internal combustion motor.

One object of the invention is to provide.

an internal combustion motor having its cylinders arranged in pairs,the cylinders of each pair being aligned, with pairs of pistons in the respective pairs of cylinders, the pistons of each pair being connected together by a piston rod and being connected also to a common crank shaft-by means of a single con- 7 necting rod.

Another object of the invention is to provide a novel assembly of cylinders and pistons arranged in pairs, the cylinders of each pair being in alignment, with a common crank shaft to which the pistons of each pair are connected by a single connecting rod.

A further feature of the invention is to provide an internal'combustion motor of the character described equipped with means for compressing air without interfering with the operation of the motor. lVith the above and other objects in view '25 this invention has particular relation to certainnovel features of construction, operation, and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings,

wherein Referring now more particularly to the r drawings, wherein like numerals of reference designate similar parts in each of the figures the numeral 1 designates the crank case of an internal combustion motor having a conventional crank shaft 2 rotatable in suitable bearings 3, therein. Mounted on this crank case is the cylinder block 4 havingthe cylinders '5, 5 alternately arranged therein." On this block there isa head plate 6, on which Y there is mounted another cylinder block .7 having the cylinders 8, 8 alternatelyarranged therein. The'cylinders 5 are aligned with 5 the corresponding cylinders 8' and the cylin ders 5 are aligned with the corresponding cylinders 8 and the outer ends of the cylinders 8, 8 are closed by the head 9.. 'The'cylinders' are thus arranged in pairs and "workingin the respective pairs of cylinders 5, 8' are the corresponding pairsof pistons 10, '11 and Working-in the cylinders 5,, 8, are the pistons I 10, 11. The pistons of the resp'ective pairs. are connected by the respective rods 12 which work through the corresponding stuffing boxes 13 in the head plate 6., The pistons 10,10 are connected to the' respective wrists of thecrank shaft by the connecting rods 14; The cylinders 5, 8' are connected by the con duits15, 15 and the cylinders'5, 8 are'con nected by the conduit-s 16,16. 1 Each cylinder has a firing chamber 17, formed in the'he ad plate 6 and communicating with the inner end of the corresponding cylinder and there is the usual spark plug anchored to said head plate and arranged to fire thecharge in the chamber 17. There is an intake manifold 19 through whichvthe explosive mixture is admitted to the respective explosion chambers. of the cylinders, the intake ofthe charges being controlled in the. well knownomanner by the intake valve 20 which is opened by the usual cam shaft 21, and closed by the usual spring'22. l v, i f v When a charge is admitted into one of two connected cylinders part of it will passinto the other of said connected cylinders form! ing, in effect, two charges which will be simultaneously compressed, and simultaneously fired, and the spent products will be simultaneously exhausted. An increase of power will thus be obtained without length ening the motor and a more compact power" unit will thus be produced having eight cylinders, without increasing the length, over the ordinary four cylinder motor.

The construction 'hereinabove described may also be used as aneflicient aircompressor branches 24, 24. These branches should be equipped with the check valves 25. When used, as an air compressor the respective cyl- 'inders 8, 8 should also have the inlet pipes 26, 26 equipped with the corresponding check valves 27, 27 Whether used as an air com pressor, or as a motor only, the respective pairs 8, 8 of cylinders should be connected by the bypass pipes 28, 28, as shown which are equipped with suitable'valves '29, 29 by means of which they may be opened and closed. When used as a motor only the pipes 23, 24, 2t and 26 will be removed and the valves 29 opened to permit the air to pass freely between thecylinders connected by the pipes 28, 28.. W'henemployed as an air compressor the valves 29 will be closed.

In the form shown in Figures 3 and 4 the numeral 30 designates the crank case on which ,thecylinder block 31 is mounted. This block is shown as having'six cylinders 32 to 37 inclusive and mounted onthe outer endof the block there is the head plate 38. Mounted on thishead plate 38 there is a cylinder block 39 having the cylinders d0 to inclusive aligned with the corresponding cylinders 32 to 37 thus forming pairs of cylinders, andthe cylinders of each pair being in alignment. 'The out-er ends'of the cylinders of the block 39 are closed by the head 46 which is suitablysecured to said block- 39.; In thepairs of aligned cylinders are the corresponding pairs of pistons 47 to 52 in clusiveand 53to 58 inclusive. The pistons of the respective pairs are connected by the rods 59'to ,64 inclusive and said pairs of pistons are connected, by the respective connecting rods v to inclusive, to the correspon'ding wrists of the'crank shaft 71 which is mountedin the crank shaft bearings 72 in thecrank case .30. i i v Tn'this form of the motor there is an intake manifold 73 through which the explosive mixture is delivered into the firing chamhers as 74,74 which communicate'with the correspondingexplosion chambers of the cyl inders of the respective pairs of cylinders. There are the spark plugs, as 7 5, 75, anchored to the firing chamber walls and adapted, to

fire the charges in said chambers. 7

The admission of the charges to the respective pairs of cylindersare controlled bvthe usual intake valves, as 76, 77, normally heldclosed by the respective springs 78, 79. Thevalve 7 8 may be actuated from the cam shaft 80, in the usual way. There are the two rocker arms 81-, 82 mounted in. the respective blocks 81, 39 and between the outer ends of these arms there is a push rod 83.-

There is a push rod 84- through which the cam shaft acts to actuate the rocker arm 81. The cam shaft 80 thus operates to open the valves 76,77 to admitthe charges to the cylinder-of each pair in proper sequence, such result being accomplished by the cam 85, on said shaft 80;

The respective pairs of cylinders are equipped with a single crank shaft and with' only six connecting rods. 7

The drawings and description are for the purpose of illustrating preferred forms of the invention, by way of example, While the broad scope of the invention is defined by the appended claims.

lVhat we claimis: V

1. An internal combustion motor including cylinders arranged in pairs, a common head plate separating the cylinders ofeach pair,

said head plate having conduits connecting the combustion chambers ofcylinders on opposite sides thereof, pairs of pistons in the respective pairs of cylinders, rods connecting the pistons of each pair of pistons, a crank shaft, and connecting rods connecting the respective pairs of piston sto the corresponding wrists of the crank shaft, 1 v

2. An internal combustion motor including two series of cylinders, the cylinders of one series being aligned with the cylinders of the.

other series, forining pairs of aligned cylin ders, head plate separating the respective series of cylinders, pairs of pistons in the respective pairs of cylinders, rods connecting the piston of each pair, said head plate having bearings through which the rods work, a crank shaft, connecting rods connecting the respective pairs of cylinders -with the wrists of said crank shaft, there being conduits through said head plate through which the combustion chambers of the cylinders of one series are connected with the combustion chambers of the cylinders of the other series.

SLAn internal combustion motor including two series of cylinders, the cylinders ,of'

one series being aligned with the cylinders of the other series, forming pairs of aligned .cylinders, a partition separating the respective series of cylinders, pairs of pistons in the respective pairs of cylinders, rods connecting the pistons of each pair, said partition having bearings through which the said rods work, a crank shaft, connecting rods connecting the respective pairs of cylinders with the wrists ofsaid crank shaft, there being conduits through said partition through which the combustion chambers of the respective cylinders of a pair are connected with the combustion chambers of the cylinders of an adjacent pair. I v

4. An internal combustion motor including a series of cylinders arranged in pairs, pairs of pistons reciprocable in the respective pairs of cylinders, each cylinder having a combus-o pression chambers, valve controlled air in,.

lets for said compression chambers, and valve controlled bypass conduits connecting the said compression chambers in pairs.

In testimony whereof we have signed our names to this specification.

ARTIE F. MoFARLAND. ARTHUR E. 'M FARLAND.

series being aligned with the cylinders of v the other series, forming pairs of aligned cylinders, each cylinder having a combustion chamber on one side of its piston and the cylinders of one series having compression chambers on the other side of the pistons thereof, a head plate separating the respective series of cylinders, pairs of pistons in the respective pairs of cylinders, rods connecting the pistons of each pair, said head plate having bearings through which the said rods work, a crank shaft, connecting rods connecting the respective pairs of pistons with the wrists of said crank shaft, a valve controlled delivery line connected into the said compression chambers, and valve controlled air inlets for said last named cylinders.

6. An internal combustion motor including cylinders arranged in pairs, a common partition separating the cylinders of each pair, there being conduits connecting the combustion chambers of the cylinders on opposite sides of the partition, pairs of pistons in the respective pairs of cylinders, rods connecting the pistons of each pair of pistons, a crank shaft and connecting rods connecting the respective pairs of pistons to the corresponding wrists of the crank shaft.

7. An internal combustion motor including two series of cylinders, the cylinders of one series being aligned with the cylinders of the other series, forming pairs of aligned cylinders, a partition separating the respective series of cylinders, pairs of pistons in the respective pairs of cylinders, each cylinder having a combustion chamber on one side of its piston and the cylinders of one series having compression chambers on the other side of the pistons thereof, rods connecting the pistons of each pair, said partition having bearings through which the said rods work, .a crank shaft, connecting rods connecting the respective bearings of the pistons with the wrists of said crank shaft, a' valve controlled delivery line connected into the said com- 

